COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Issue Date:
2002
Abstract(summary):
Semiconductor nanocrystals whose optical properties are largely determined by the quantum confinement effect are currently being extensively studied in both physics and chemistry. Highly luminescent thiol-capped CdTe and HgTe nanocrystals with desirable sizes ranging from less than two to approximately 8 nm have been recently synthesized in aqueous solutions by a wet chemical route. They were used for the preparation of composite multilayer thin films by the layer-by-layer (LBL) deposition technique. Films containing luminescent nanocrystals were made both on planar substrates and on submicron-sized monodisperse polystyrene spheres. Alternatively, nanocrystals have been incorporated as cores into silica spheres of desirable sizes. Composite nano crystal/silica and core-shell latex/nanocrystal spheres have been used as building blocks for 3-D colloidal photonic crystals. (C) 2002 Elsevier Science B.V. All rights reserved.